AVNRT: Difference between revisions

AVNRT (view source)

Revision as of 16:16, 20 September 2011

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 *'''Typical ANVRT''' (also described as common ANVRT or slow-fast ANVRT):  The impulse travels over the slow pathway towards the ventricles and returns via the fast pathway to the atria. The retrograde P wave (or Atrial echo) shows up at the end of the QRS. 90 % of all patients with ANVRT are diagnosed with typical ANVRT. Spontaneous termination of typical AVNRT often occurs in the fast pathway (terminates with a QRS on the ECG), induced termination with carotid sinus massage or adenosine results in termination in the slow pathway (terminates with retrograde P on ECG).
 *'''Atypical ANVRT''' (also described as uncommon ANVRT or fast-slow ANVRT): The impulse travels via the fast pathway towards the ventricles and returns via the slow pathway to the atria.  The retrograde P wave appears far behind the QRS. Only about 6% of all ANVRT patients are diagnosed with atypical ANVRT.
-*The remaining cases of ANVRT patients are diagnosed with a form of ANVRT that is even more rare. This form of ANVRT is '''slow/slow ANVRT''' (The impulse follows a complex route through the AV node and the surrounding area). Only 4 % of all patients diagnosed with ANVRT have slow/slow ANVRT.
+The remaining cases of ANVRT patients are diagnosed with a form of ANVRT that is even more rare. This form of ANVRT is '''slow/slow ANVRT''' (The impulse follows a complex route through the AV node and the surrounding area). Only 4 % of all patients diagnosed with ANVRT have slow/slow ANVRT.
 ==How does an ANVRT show up on an ECG?==